Add some write-verification tools [copy seems to work]

.gitignore

@@ -11,6 +11,7 @@ initrd/etc
 hdd/boot
 hdd/bin/*
 hdd/etc/hostname
+hdd/lib
 .gdb_history
 bootdisk.img
 util/toaru-toolchain/*

userspace/compare.c

@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <string.h>
+
+#define CHUNK_SIZE 1024
+
+int main(int argc, char * argv[]) {
+	if (argc < 3) {
+		fprintf(stderr, "Need two files to compare.\n");
+		return 1;
+	}
+
+	FILE * a = fopen(argv[1], "r");
+	FILE * b = fopen(argv[2], "r");
+	size_t lengtha, lengthb;
+
+	fseek(a, 0, SEEK_END);
+	lengtha = ftell(a);
+	fseek(a, 0, SEEK_SET);
+
+	fseek(b, 0, SEEK_END);
+	lengthb = ftell(b);
+	fseek(b, 0, SEEK_SET);
+
+	fprintf(stderr,"[%d bytes and %d bytes]\n", lengtha, lengthb);
+
+	char bufa[CHUNK_SIZE];
+	char bufb[CHUNK_SIZE];
+
+	int chunk = 0;
+	size_t read = 0;
+
+	while (read < lengtha) {
+		memset(bufa, 0x0, CHUNK_SIZE);
+		memset(bufb, 0x0, CHUNK_SIZE);
+		fread(bufa, 1, CHUNK_SIZE, a);
+		fread(bufb, 1, CHUNK_SIZE, b);
+		size_t different = 0;
+		for (int i = 0; i < CHUNK_SIZE; ++i) {
+			if (bufa[i] != bufb[i])
+				different++;
+		}
+
+		if (different > 0) {
+			printf("Chunk %d has %d differing bytes.\n", chunk, different);
+		}
+
+		read += CHUNK_SIZE;
+		chunk++;
+	}
+
+	fclose(a);
+	fclose(b);
+
+
+	return 0;
+}

userspace/verify-write.c

@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <unistd.h>
+
+#define CHUNK_SIZE 1024
+
+int main(int argc, char * argv[]) {
+	if (argc < 3) {
+		printf("Expected two arguments, the file to read, and the filename to write out to.\nTry again, maybe?\n");
+		return -1;
+	}
+	FILE * input  = fopen(argv[1], "r");
+	FILE * output = fopen(argv[2], "w");
+	size_t length;
+
+	fseek(input, 0, SEEK_END);
+	length = ftell(input);
+	fseek(input, 0, SEEK_SET);
+
+	char buf[CHUNK_SIZE];
+	while (length > CHUNK_SIZE) {
+		fread( buf, 1, CHUNK_SIZE, input);
+		fwrite(buf, 1, CHUNK_SIZE, output);
+		fflush(output);
+		length -= CHUNK_SIZE;
+	}
+	if (length > 0) {
+		fread( buf, 1, length, input);
+		fwrite(buf, 1, length, output);
+		fflush(output);
+	}
+
+	fclose(output);
+	fclose(input);
+
+	char * args[] = {"/bin/compare", argv[1], argv[2], NULL };
+	execve(args[0], args, NULL);
+
+	return 0;
+}